Hi Tanyeemgazi,
When taking the FTMO Challenge you need to keep your account from losing more than 5% of your account balance in one day. To do this you need to set the risk of each robot you are trading so this does not occur. It is recommended to keep the total account balance risk below 3%. So, if you are trading 3 robots then each robot can be set to have a risk of 1%. To do this you need to set the lot size properly. Since you are using just 3 robots you can set each robot to the lot size recommended in the setfiles.
By dividing the lot size by three for each robot you have limited your daily account loss to 1%. This is fine, however it will take much longer to pass then challenge.
Here is the thing about passing the challenge. The larger the risk the sooner you could possibly pass the challenge, however the risk is increased of failing the maximum daily drawdown of 5% or falling below the total account loss of 10%. The lower the risk the longer it will take to pass the challenge but the risk of losing your account is lowered. Each trader must decide how much risk to take as each traders risk tolerance is different.
Alan,